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Changing battery charge rate from a Bluefruit Feather 32u4
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Changing battery charge rate from a Bluefruit Feather 32u4

by ayoganandan on Thu Jun 20, 2019 6:27 pm

Hello,

We are putting together a simple circuit, where an Adafruit Bluefruit Feather 32u4 is connected to a LIPO battery, which gets charged when the Feather is plugged in.
The Battery in turn drives a few other boards. We notice that the rate at which the Feather charges the battery is very slow and we would like to speed it up.
The schematic
https://cdn-learn.adafruit.com/assets/assets/000/028/668/original/adafruit_products_schem.png?1447886222shows that the Default resistance (R8) is 10k or 100mA charge rate. We would like to change it to 2k to get a 500mA charging rate, but are finding it hard to locate it on the board. Do you have a placement diagram/could you please point the physical location of there resistor to us or help figure out how to get a hold of it?

Thanks,
Arun

ayoganandan
 
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Re: Changing battery charge rate from a Bluefruit Feather 32

by tavdog on Mon Aug 19, 2019 11:25 pm

I too tried to increase the charge rate. I believe the 10k resistor is the vertical component at the very center of the attached image. I added a 2k resistor in parallel to try to get the maximum charge rate but the charge rate has not changed. I guess it is possible that the lipo charger used on the feathers is not adjustable or maybe I did it wrong.
Screen Shot 2019-08-19 at 19 Mon 5.18.26 PM.png
Screen Shot 2019-08-19 at 19 Mon 5.18.26 PM.png (731.95 KiB) Viewed 23 times

tavdog
 
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Re: Changing battery charge rate from a Bluefruit Feather 32

by tavdog on Tue Aug 20, 2019 12:02 am

Actually that is the correct resistor. I got it working by removing the resistor and replacing it with a 2k

tavdog
 
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